Overview
The Hankison HMD20-3 membrane air dryer (part number 3241444) is a proven solution for removing moisture from compressed air in industrial and HVAC applications. This passive dryer operates without electricity, making it ideal for remote locations and environments where electrical power is unavailable or impractical. With a rated capacity of 7.8 SCFM at 100 PSIG and a maximum operating pressure of 175 PSIG, the HMD20-3 serves as both a dedicated point-of-use dryer and a backup desiccant solution in larger systems.
Key Features
- No electrical power required—passive operation with semipermeable hollow-fiber membranes
- Rated capacity of 7.8 SCFM at 100 PSIG and 175 PSIG maximum pressure
- 3/8″ NPT inlet and outlet connections for easy installation
- Compact design suitable for point-of-use applications where space is limited
- CAGI ADF 700 standard tested and rated for reliable performance
- Available new in open box condition—factory-fresh with minimal shelf wear
Technical Specifications
- Part Number: HMD20-3 (MPN 3241444)
- Manufacturer: Hankison (SPXFlow)
- Type: Membrane compressed air dryer
- Capacity: 7.8 SCFM @ 100 PSIG
- Maximum Pressure: 175 PSIG (12 bar)
- Inlet/Outlet Connection: 3/8″ NPT
- Operating Temperature: Ambient dependent (passive operation)
- Length: 15.3 inches
- Width: 4.2 inches
- Standards: CAGI ADF 700
Typical Applications
The HMD20-3 excels in environments where:
- Point-of-use drying is needed in remote or no-power locations
- Low flow rates (under 10 SCFM) require moisture removal
- Backup or redundant drying capacity complements existing compressor systems
- Instrument air or low-pressure process applications demand moisture control
- Passive operation eliminates maintenance overhead and energy costs
Compatibility & Replacements
Compatible With
- Rotary screw, reciprocating, and centrifugal air compressors
- Standard 3/8″ NPT threaded connections in compressed air systems
- HVAC and refrigeration piping systems
- Desiccant dryer towers and refrigerated dryer systems
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The HMD20-3 is part of the HMD Series and may replace earlier-generation Hankison membrane dryers with identical connection sizes and pressure ratings.
Works With
- No software or control platforms required—passive mechanical operation
- Compatible with pneumatic systems using standard ISO 6162 and SAE J518 connections
- Works with compressed air treatment systems (pre-filters, aftercoolers, desiccant dryers)
